Plaster board



Feb. 10, 1925.

c. R. BIRDSEY l L R BOARD original File'dah.

mmf/

Patented Feb. lO, 1925.

' unimos-'raras J1,525,715 PATENT orifice.

i CHARLES It.` BIBDSEY, OF HINSDALE, ILLINOIS, ASSIGNOR TO UNITED STATES GYP- SUM COMPANY, OF CHICAGO, ILLINOIS, A. CORPORATION F ILLINOIS.

PLASTEB. BOARD.

Original application led January 2, 1920, SerialNo. 348,940. Divided and this application filedl January 3, 1921'.

. To all tvhom t may concern.' v

Be it known that I, CHARLES R. BIRDSEY,

a citizen of the United States, residing at Hinsdale, in the county of Du Page and 'State of Illinois, have invented certain new and useful Improvements in Plaster Board (Case 13 2), of which the following is a description.

' My invention belongs tothat-general class of devices known as plaster board or the like,

and relates particularly to an improved board which willbe simple, convenient, sub- .v stantiahdurable, satisfactory and efficient,

and which may be economically and ac- 15 curately manufactured. The invention relates particularly to a type of boa-rd in which the plaster, plaster Paris or plastic material body is substantially enclosed on one or both opposite or other edges, as well as on the face sides, and in which the edges may be perfectly formed to conform to a definite specification as to size orangle. Many other Jobjects and advantages of the construction herein shown and described will be obvious .25 to those skilled inthe art from the disclosures herein given.

' To this end my invention consists in the novely construction, arrangement and combination of parts herein shown and described, and more particularly pointed out in the claims.

In the drawings, wherein like reference characters indicate like or corresponding parts, l

Figure 1v is a' sectional view through a portion of a plaster board .embodying the invention;

Figure '2 is a similar View of a modified form of this invention.

Figure 3 is a similar view' of another modification. Figure 4 is a perspective view of a of the board shown in Figure 1.

J It may be mentioned that the' present application is a divisional application of my application Serial No. 348,940, filed January 2, 1920, which matured into Patent 1,395,031y

on October 25, 1921.

Referring to the drawings, 1 represents abody of suitable material, as for example plaster, plaster Paris or any equivalent for the purpose, which may be handled, preferably in a plastic state and Athereafter allowed to set or harden. The bodyis enclosed portion Serial N0. 434,650.

between the' covering sheets 2 and 3 of suitable material, and 'in this connection it may be mentioned that I have found paper of the desired weight and thickness very satisfactory vfor the purpose. y

In this type of board one sheet, as showny sheet 3, is flanged or folded over to enclose an edge portion 4 at one or both sides, the same being preferably scored at 6 so as to form a uniform coi-ner, as shown. The other covering sheet, as shown sheet 2, is preferably of a width to form an overlapping end portion or flange 5 overlying the'other flange on the other sheet at one or both sides. The sheets may be similarly formed at the opposite' side of the board as shown in Figure 2 or integrally, or otherwise formed at 7 Figure 1. Obviously, it is immaterialw as to which flange is on the inside or outside, and where so constructed at both edges, the flange of one sheet atv one edge might been posite side of the board. It is also immaterial as to how much the .edge portions overlie inasmuch as each one overlaps the other, and the edges of the board will be perfectly and completely sealed. The extreme edge of the outer flange 5 may extend flush with the extreme edge of the cover sheet 3 if so desired, as shown in Figure 3. In constructing this type of board, while the overlying or overlapping edges 4 and 5 may be secured together in any suitable manner, ordinarily enough plaster or plaster Paris, if the body is constructed of this or its equivalent, may flow up betweenthe two upturned 'portions 4 and 5, securely sealing the same and main- 'the inside, and be on the outside on the optaining the parts together. The board may .y

be manufactured by such method, process or machinery as may be yfound suitable for th purpose.

' It will be noted that in all of these constructions, the edge is substantially completely. enclosed, and as before mentioned, this may be at one or both sides. If the two vsheets are integral and wrapped or folded over one edge,or it is desired to enclose only one edUe, then this construction Imight, only be empIoyed at one edge, the opposite edge being different. The resulting product is produced with a finished and smooth edge and at a perfect desired angle, the board being uniform in width throughout its length. The completed product has many advantages, including increased strength and durability, and an improved appearance. In case of handling, the edges are protected, and there is no breaking away nor sifting out or powdering of the body at the edge. It will be noted that there is a double thickness of covering sheets at the eXtreme edge of the board. y

Havingthus described my inventidn it is obvious that various immaterial modifications may be made in the same Without departin from the spirit of my invention; hence il do not wish `,to be understoodl as limiting myself to exact form, construction,I arrangement and combination of partsl herein shown and described, or uses mentioned. What I claim as new and desire to secure I by Letters Patent is:

l. A plaster board of the kind described comprising a body and a cover sheet arranged at each face side thereof, one of said sheets folded over the edge of the body and adhering thereto, and the other sheet folded over and extending to adjacent the first mentioned sheet andsecured thereto.

2. A plaster board of the kind described comprising a body and a cover sheet arranged at each face side thereof, one of said sheets folded over the edge of the body and adhering thereto, and the other sheet folded over the folded lover portion of the first mentioned sheet.

3. A vplaster board of the kind described comprising a body and a cover sheet extending over each face side thereof, said sheet at oneface folded over the edge of the body and adherir'g thereto, and the sheet at the other face folded over and overlying the other folded portion and secured thereto.

` 4. A plaster board of the kind described compri-sing ay body and a cover sheet eXL tending over each face side thereof, said sheet at one face folded over the opposite edges of the board and adherin thereto, and the sheet at the other face fo ded over and overlying the other folded portions and secured thereto.

5. A plaster board of the kind described comprising a body enclosed on opposite faces thereof, the enclosing sheets folded over and overlapping each other at one of the edges of the board and each terminated short of the opposite side face.

. 6. A plaster board of the kind described comprising a body enclosed on opposite faces thereof, the enclosing sheets folded over to overlap each other at one of the edges of the board and secured together thereat and each 'terminated short of the opposite side face.

7. A plaster board of the kind described comprising a body enclosed on opposite side faces, the enclosingv sheets folded'over at the vcorners of one edge of the body to overlap each other along the face of the edge of thebody, the folded over portions each terminated short of the cover sheet body on the oposite side face.

8. plaster board of the kind described comprises a body enclosed on opposite faces thereof, the enclosing sheets folded over and overlapping each other at the opposite edges of the board and each terminated short of the opposite side face.

In testimony whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

CHARLES R. BIRDSEY.

Witnesses:

ROY W. HILL, BERTHA HARTMANN. 

